Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 227-930-1 | CAS number: 6041-94-7
Substance identity
Identification
- Display Name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- EC Number:
- 227-930-1
- EC Name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- CAS Number:
- 6041-94-7
- Molecular formula:
- C23H15Cl2N3O2
- IUPAC Name:
- 4-[(2,5-dichlorophenyl)diazenyl]-3-hydroxy-N-phenyl-2-naphthamide
Type of Substance
- Composition:
- mono-constituent substance
- Origin:
- organic
Substance Identifiers open all close all
Compositions
Boundary Composition(s) open all close all
Impurity
Nanoform
| Impurity |
| Nanoform |
- State Form:
- solid: nanoform
- Degree of purity:
- > 90 - < 100 % (w/w)
Constituent 1
- Reference substance name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- EC Number:
- 227-930-1
- EC Name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- CAS Number:
- 6041-94-7
- Molecular formula:
- C23H15Cl2N3O2
- IUPAC Name:
- 4-[(2,5-dichlorophenyl)diazenyl]-3-hydroxy-N-phenyl-2-naphthamide
Impurity 1
- Reference substance name:
- 3-hydroxy-2-naphthanilide
- EC Number:
- 202-188-1
- EC Name:
- 3-hydroxy-2-naphthanilide
- CAS Number:
- 92-77-3
- Molecular formula:
- C17H13NO2
- IUPAC Name:
- 3-hydroxy-N-phenyl-2-naphthamide
Characterisation of nanoforms
- Type of information reported:
- single nanoform
- Name of nanoform:
- C.I. Pigment Red 2 - joint submission
Shape
Shape descriptionopen allclose all
- Shape category:
- spheroidal
- Remarks:
- multimodal shapes
- Shape:
- cubic
- Pure shape:
- no
- Range:
- >= 0 - <= 100 %
- Shape category:
- spheroidal
- Remarks:
- multimodal shapes
- Shape:
- spherical
- Pure shape:
- no
- Range:
- >= 0 - <= 100 %
- Shape category:
- elongated
- Remarks:
- multimodal shapes
- Shape:
- rod
- Pure shape:
- yes
- Range:
- >= 0 - <= 100 %
Particle size distribution and range
Particle size distribution and rangeopen allclose all
- Shape category:
- elongated
- Remarks:
- multimodal shapes
Percentileopen allclose all
- Percentile:
- D10
- Range:
- ca. 0.004 - ca. 0.1 μm
- Percentile:
- D50
- Range:
- ca. 0.03 - ca. 0.1 μm
- Percentile:
- D90
- Range:
- ca. 0.05 - ca. 0.2 μm
- Range of length:
- ca. 0.1 - ca. 0.405 μm
- Range of aspect ratio (:1):
- >= 3 - <= 4.4
- Fraction of constituent particles in the size range 1-100 nm:
- > 50 - ca. 100 %
Crystallinity
Structures
- Structure:
- crystalline
- Name:
- C.I. Pigment Red 2
- Pure structure:
- yes
Specific surface area
- Range of specific surface area:
- >= 5 - <= 200 m²/g
Surface functionalisation / treatment
- Surface treatment applied:
- no
Impurity
Nanoform
| Impurity |
| Nanoform |
- State Form:
- solid: nanoform
- Degree of purity:
- >= 90 - <= 100 % (w/w)
Constituent 1
- Reference substance name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- EC Number:
- 227-930-1
- EC Name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- CAS Number:
- 6041-94-7
- Molecular formula:
- C23H15Cl2N3O2
- IUPAC Name:
- 4-[(2,5-dichlorophenyl)diazenyl]-3-hydroxy-N-phenyl-2-naphthamide
Impurity 1
- Reference substance name:
- 3-hydroxy-2-naphthanilide
- EC Number:
- 202-188-1
- EC Name:
- 3-hydroxy-2-naphthanilide
- CAS Number:
- 92-77-3
- Molecular formula:
- C17H13NO2
- IUPAC Name:
- 3-hydroxy-N-phenyl-2-naphthamide
Characterisation of nanoforms
- Type of information reported:
- single nanoform
- Name of nanoform:
- C.I. Pigment Red 2 - joint submission
Shape
Shape descriptionopen allclose all
- Shape category:
- spheroidal
- Shape:
- spherical
- Pure shape:
- no
- Range:
- >= 0 - <= 100 %
- Shape category:
- spheroidal
- Shape:
- cubic
- Pure shape:
- no
- Range:
- >= 0 - <= 100 %
- Shape category:
- elongated
- Shape:
- rod
- Pure shape:
- no
- Range:
- >= 0 - <= 100 %
Particle size distribution and range
Particle size distribution and rangeopen allclose all
- Shape category:
- elongated
Percentileopen allclose all
- Percentile:
- D10
- Range:
- ca. 0.004 - ca. 0.1 μm
- Percentile:
- D50
- Range:
- ca. 0.03 - ca. 0.1 μm
- Percentile:
- D90
- Range:
- ca. 0.05 - ca. 0.2 μm
- Range of length:
- ca. 0.1 - ca. 0.405 μm
- Range of aspect ratio (:1):
- >= 3 - <= 4.4
- Additional information:
- The particle size distribution relates to all shape categories
- Fraction of constituent particles in the size range 1-100 nm:
- > 50 - ca. 100 %
- Shape category:
- spheroidal
Percentileopen allclose all
- Percentile:
- D10
- Range:
- ca. 0.004 - ca. 0.1 μm
- Percentile:
- D50
- Range:
- ca. 0.03 - ca. 0.1 μm
- Percentile:
- D90
- Range:
- ca. 0.05 - ca. 0.2 μm
- Additional information:
- The particle size distribution relates to all shape categories
- Fraction of constituent particles in the size range 1-100 nm:
- > 50 - ca. 100 %
Crystallinity
Structures
- Structure:
- crystalline
- Name:
- C.I. Pigment Red 2
- Pure structure:
- yes
Specific surface area
- Range of specific surface area:
- >= 5 - <= 200 m²/g
Surface functionalisation / treatment
- Surface treatment applied:
- no
Legal Entity Composition(s) open all close all
Impurity
Nanoform
| Impurity |
| Nanoform |
- State Form:
- solid: nanoform
- Degree of purity:
- > 95 - < 100 % (w/w)
Constituent 1
- Reference substance name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- EC Number:
- 227-930-1
- EC Name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- CAS Number:
- 6041-94-7
- Molecular formula:
- C23H15Cl2N3O2
- IUPAC Name:
- 4-[(2,5-dichlorophenyl)diazenyl]-3-hydroxy-N-phenyl-2-naphthamide
Impurity 1
- Reference substance name:
- 3-hydroxy-2-naphthanilide
- EC Number:
- 202-188-1
- EC Name:
- 3-hydroxy-2-naphthanilide
- CAS Number:
- 92-77-3
- Molecular formula:
- C17H13NO2
- IUPAC Name:
- 3-hydroxy-N-phenyl-2-naphthamide
Characterisation of nanoforms
- Type of information reported:
- single nanoform
- Name of nanoform:
- C.I. Pigment Red 2 - joint submission
Shape
Shape descriptionopen allclose all
- Shape category:
- spheroidal
- Remarks:
- multimodal shapes containing about 94% spheroidal particles and about 6% elongated particle
- Shape:
- cubic
- Pure shape:
- no
- Typical composition:
- ca. 89 %
- Range:
- > 70 - < 95 %
- Shape category:
- spheroidal
- Remarks:
- multimodal shapes containing about 94% spheroidal particles and about 6% elongated particle
- Shape:
- spherical
- Pure shape:
- no
- Typical composition:
- ca. 5 %
- Range:
- > 0 - < 25 %
- Shape category:
- elongated
- Remarks:
- multimodal shapes containing about 94% spheroidal particles and about 6% elongated particle
- Shape:
- rod
- Pure shape:
- yes
- Typical composition:
- ca. 6 %
- Range:
- > 0 - < 25 %
Particle size distribution and range
Particle size distribution and rangeopen allclose all
- Shape category:
- spheroidal
- Remarks:
- multimodal shapes containing abot 94% spheroidal particles and about 6% elongated particle
Percentileopen allclose all
- Percentile:
- D10
- Typical value:
- ca. 0.052 μm
- Range:
- ca. 0.02 - ca. 0.085 μm
- Percentile:
- D50
- Typical value:
- ca. 0.085 μm
- Range:
- ca. 0.055 - ca. 0.1 μm
- Percentile:
- D90
- Typical value:
- ca. 0.15 μm
- Range:
- ca. 0.12 - ca. 0.18 μm
- Fraction of constituent particles in the size range 1-100 nm:
- >= 50 - ca. 100 %
- Shape category:
- elongated
- Remarks:
- multimodal shapes containing abot 94% spheroidal particles and about 6% elongated particle
Percentileopen allclose all
- Percentile:
- D10
- Typical value:
- ca. 0.052 μm
- Range:
- ca. 0.02 - ca. 0.085 μm
- Percentile:
- D50
- Typical value:
- ca. 0.085 μm
- Range:
- ca. 0.055 - ca. 0.1 μm
- Percentile:
- D90
- Typical value:
- ca. 0.15 μm
- Range:
- ca. 0.12 - ca. 0.18 μm
- Typical length:
- 0.252 μm
- Range of length:
- ca. 0.14 - ca. 0.365 μm
- Typical aspect ratio (:1):
- ca. 3.5 :1
- Range of aspect ratio (:1):
- >= 3 - <= 4.2
- Additional information:
- The determined particle size distribution relates to both shape categories. Due to the very low number of elongated particles, no separate evaluation for rods had been conducted. The smallest dimension of all particles had been considered.
- Fraction of constituent particles in the size range 1-100 nm:
- >= 50 - ca. 100 %
Crystallinity
Structures
- Structure:
- crystalline
- Name:
- C.I. Pigment Red 2
- Pure structure:
- yes
- Crystal system:
- monoclinic
- Bravais lattice:
- primitive moniclinic
Specific surface area
- Typical specific surface area:
- 32 m²/g
- Range of specific surface area:
- >= 22 - <= 42 m²/g
- Skeletal density:
- 1.466 g/cm³
Surface functionalisation / treatment
- Surface treatment applied:
- no
Nanoform
| Nanoform |
- State Form:
- solid: nanoform
Constituent 1
- Reference substance name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- EC Number:
- 227-930-1
- EC Name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- CAS Number:
- 6041-94-7
- Molecular formula:
- C23H15Cl2N3O2
- IUPAC Name:
- 4-[(2,5-dichlorophenyl)diazenyl]-3-hydroxy-N-phenyl-2-naphthamide
Characterisation of nanoforms
- Type of information reported:
- single nanoform
- This nanoform is covered by a registration:
- yes
- Name of nanoform:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
Shape
Shape descriptionopen allclose all
- Shape category:
- spheroidal
- Shape:
- spherical
- Pure shape:
- no
- Range:
- > 0 - < 100 %
- Shape category:
- elongated
- Shape:
- rod
- Pure shape:
- no
- Range:
- > 0 - < 100 %
Particle size distribution and range
Particle size distribution and rangeopen allclose all
- Shape category:
- spheroidal
Percentileopen allclose all
- Percentile:
- D10
- Typical value:
- ca. 0.06 μm
- Range:
- > 0.004 - < 0.1 μm
- Percentile:
- D50
- Typical value:
- ca. 0.073 μm
- Range:
- > 0.03 - < 0.1 μm
- Percentile:
- D90
- Typical value:
- ca. 0.15 μm
- Range:
- > 0.05 - < 0.2 μm
- Fraction of constituent particles in the size range 1-100 nm:
- > 50 - < 100 %
- Shape category:
- elongated
Percentileopen allclose all
- Percentile:
- D10
- Typical value:
- ca. 0.06 μm
- Range:
- > 0.004 - < 0.1 μm
- Percentile:
- D50
- Typical value:
- ca. 0.073 μm
- Range:
- > 0.03 - < 0.1 μm
- Percentile:
- D90
- Typical value:
- ca. 0.15 μm
- Range:
- > 0.05 - < 0.2 μm
- Range of length:
- > 100 - <= 200 nm
- Range of aspect ratio (:1):
- >= 3 - <= 4.5
- Fraction of constituent particles in the size range 1-100 nm:
- > 50 - < 100 %
Crystallinity
Structures
- Structure:
- crystalline
- Name:
- Pigment Red 2
- Pure structure:
- yes
- Description:
- Pigment looks crystalline in nature.
Specific surface area
- Typical specific surface area:
- ca. 50.87 m²/g
- Range of specific surface area:
- > 5 - < 200 m²/g
Surface functionalisation / treatment
- Surface treatment applied:
- no
- State Form:
- solid: nanoform
Constituent 1
- Reference substance name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- EC Number:
- 227-930-1
- EC Name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- CAS Number:
- 6041-94-7
- Molecular formula:
- C23H15Cl2N3O2
- IUPAC Name:
- 4-[(2,5-dichlorophenyl)diazenyl]-3-hydroxy-N-phenyl-2-naphthamide
Characterisation of nanoforms
- Type of information reported:
- single nanoform
- Name of nanoform:
- C.I. Pigment Red 2 - joint submission
Shape
Shape descriptionopen allclose all
- Shape category:
- spheroidal
- Shape:
- spherical
- Pure shape:
- no
- Typical composition:
- 85 %
- Range:
- >= 0 - <= 100 %
- Shape category:
- elongated
- Shape:
- rod
- Pure shape:
- no
- Typical composition:
- 15 %
- Range:
- >= 0 - <= 100 %
Particle size distribution and range
Particle size distribution and rangeopen allclose all
- Shape category:
- elongated
Percentileopen allclose all
- Percentile:
- D10
- Typical value:
- 65 nm
- Range:
- >= 4 - <= 100 nm
- Percentile:
- D50
- Typical value:
- 90 nm
- Range:
- >= 30 - <= 100 nm
- Percentile:
- D90
- Typical value:
- 130 nm
- Range:
- >= 50 - <= 200 nm
- Typical length:
- 155 nm
- Range of length:
- >= 100 - <= 405 nm
- Range of aspect ratio (:1):
- >= 3 - <= 4.4
- Fraction of constituent particles in the size range 1-100 nm:
- > 50 - <= 100 %
Crystallinity
Structures
- Structure:
- crystalline
- Name:
- C.I. Pigment Red 2
- Pure structure:
- yes
Specific surface area
- Typical specific surface area:
- 46.2 m²/g
- Range of specific surface area:
- >= 5 - <= 200 m²/g
Surface functionalisation / treatment
- Surface treatment applied:
- no
- Does the set contain both treated and non-surface treated nanoforms?:
- no
Impurity
Nanoform
| Impurity |
| Nanoform |
- State Form:
- solid: nanoform
- Degree of purity:
- > 95 - < 100 % (w/w)
Constituent 1
- Reference substance name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- EC Number:
- 227-930-1
- EC Name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- CAS Number:
- 6041-94-7
- Molecular formula:
- C23H15Cl2N3O2
- IUPAC Name:
- 4-[(2,5-dichlorophenyl)diazenyl]-3-hydroxy-N-phenyl-2-naphthamide
Impurity 1
- Reference substance name:
- 3-hydroxy-2-naphthanilide
- EC Number:
- 202-188-1
- EC Name:
- 3-hydroxy-2-naphthanilide
- CAS Number:
- 92-77-3
- Molecular formula:
- C17H13NO2
- IUPAC Name:
- 3-hydroxy-N-phenyl-2-naphthamide
Characterisation of nanoforms
- Type of information reported:
- single nanoform
- Name of nanoform:
- C.I. Pigment Red 2 - joint submission
Shape
Shape descriptionopen allclose all
- Shape category:
- spheroidal
- Remarks:
- multimodal shapes containing about 94% spheroidal particles and about 6% elongated particle
- Shape:
- cubic
- Pure shape:
- no
- Typical composition:
- ca. 89 %
- Range:
- > 70 - < 95 %
- Shape category:
- spheroidal
- Remarks:
- multimodal shapes containing about 94% spheroidal particles and about 6% elongated particle
- Shape:
- spherical
- Pure shape:
- no
- Typical composition:
- ca. 5 %
- Range:
- > 0 - < 25 %
- Shape category:
- elongated
- Remarks:
- multimodal shapes containing about 94% spheroidal particles and about 6% elongated particle
- Shape:
- rod
- Pure shape:
- yes
- Typical composition:
- ca. 6 %
- Range:
- > 0 - < 25 %
Particle size distribution and range
Particle size distribution and rangeopen allclose all
- Shape category:
- spheroidal
- Remarks:
- multimodal shapes containing abot 94% spheroidal particles and about 6% elongated particle
Percentileopen allclose all
- Percentile:
- D10
- Typical value:
- ca. 0.052 μm
- Range:
- ca. 0.02 - ca. 0.085 μm
- Percentile:
- D50
- Typical value:
- ca. 0.085 μm
- Range:
- ca. 0.055 - ca. 0.1 μm
- Percentile:
- D90
- Typical value:
- ca. 0.15 μm
- Range:
- ca. 0.12 - ca. 0.18 μm
- Fraction of constituent particles in the size range 1-100 nm:
- >= 50 - ca. 100 %
- Shape category:
- elongated
- Remarks:
- multimodal shapes containing abot 94% spheroidal particles and about 6% elongated particle
Percentileopen allclose all
- Percentile:
- D10
- Typical value:
- ca. 0.052 μm
- Range:
- ca. 0.02 - ca. 0.085 μm
- Percentile:
- D50
- Typical value:
- ca. 0.085 μm
- Range:
- ca. 0.055 - ca. 0.1 μm
- Percentile:
- D90
- Typical value:
- ca. 0.15 μm
- Range:
- ca. 0.12 - ca. 0.18 μm
- Typical length:
- 0.252 μm
- Range of length:
- ca. 0.14 - ca. 0.365 μm
- Typical aspect ratio (:1):
- ca. 3.5 :1
- Range of aspect ratio (:1):
- >= 3 - <= 4.2
- Additional information:
- The determined particle size distribution relates to both shape categories. Due to the very low number of elongated particles, no separate evaluation for rods had been conducted. The smallest dimension of all particles had been considered.
- Fraction of constituent particles in the size range 1-100 nm:
- >= 50 - ca. 100 %
Crystallinity
Structures
- Structure:
- crystalline
- Name:
- C.I. Pigment Red 2
- Pure structure:
- yes
- Crystal system:
- monoclinic
- Bravais lattice:
- primitive moniclinic
Specific surface area
- Typical specific surface area:
- 32 m²/g
- Range of specific surface area:
- >= 22 - <= 42 m²/g
- Skeletal density:
- 1.466 g/cm³
Surface functionalisation / treatment
- Surface treatment applied:
- no
- State Form:
- solid: particulate/powder
Constituent 1
- Reference substance name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- EC Number:
- 227-930-1
- EC Name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- CAS Number:
- 6041-94-7
- Molecular formula:
- C23H15Cl2N3O2
- IUPAC Name:
- 4-[(2,5-dichlorophenyl)diazenyl]-3-hydroxy-N-phenyl-2-naphthamide
- State Form:
- solid: nanoform
Constituent 1
- Reference substance name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- EC Number:
- 227-930-1
- EC Name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- CAS Number:
- 6041-94-7
- Molecular formula:
- C23H15Cl2N3O2
- IUPAC Name:
- 4-[(2,5-dichlorophenyl)diazenyl]-3-hydroxy-N-phenyl-2-naphthamide
Characterisation of nanoforms
- Type of information reported:
- single nanoform
- This nanoform is covered by a registration:
- yes
- Name of nanoform:
- C.I. Pigment Red 2-joint submission
Shape
Shape description
- Shape category:
- elongated
- Shape:
- rod
- Pure shape:
- yes
Particle size distribution and range
Particle size distribution and range
- Shape category:
- elongated
Percentileopen allclose all
- Percentile:
- D90
- Typical value:
- ca. 88.05 nm
- Range:
- ca. 0.05 - ca. 0.2 μm
- Percentile:
- D50
- Typical value:
- ca. 52.82 nm
- Range:
- ca. 0.03 - ca. 0.1 nm
- Percentile:
- D10
- Typical value:
- ca. 32.83 nm
- Range:
- ca. 0.004 - ca. 0.1 μm
- Range of length:
- > 0.1 - < 0.405 μm
- Typical aspect ratio (:1):
- ca. 1.9 :1
- Range of aspect ratio (:1):
- >= 1.9 - <= 4
- Fraction of constituent particles in the size range 1-100 nm:
- > 50 - ca. 100 %
Crystallinity
Structures
- Structure:
- crystalline
- Name:
- C.I. Pigment Red 2
- Pure structure:
- yes
Specific surface area
- Typical specific surface area:
- ca. 40.473 m²/g
- Range of specific surface area:
- >= 5 - <= 200 m²/g
Surface functionalisation / treatment
- Surface treatment applied:
- no
- State Form:
- solid: nanoform
Constituent 1
- Reference substance name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- EC Number:
- 227-930-1
- EC Name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- CAS Number:
- 6041-94-7
- Molecular formula:
- C23H15Cl2N3O2
- IUPAC Name:
- 4-[(2,5-dichlorophenyl)diazenyl]-3-hydroxy-N-phenyl-2-naphthamide
Characterisation of nanoforms
- Type of information reported:
- single nanoform
- This nanoform is covered by a registration:
- yes
- Name of nanoform:
- C.I. Pigment Red 2-joint submission
Shape
Shape description
- Shape category:
- spheroidal
- Shape:
- polyhedral
- Pure shape:
- yes
- Range:
- > 0 - < 100 %
Particle size distribution and range
Particle size distribution and range
- Shape category:
- spheroidal
Percentileopen allclose all
- Percentile:
- D10
- Typical value:
- 0.042 μm
- Range:
- > 0.02 - < 0.06 μm
- Percentile:
- D50
- Typical value:
- 0.068 μm
- Range:
- > 0.04 - < 0.09 μm
- Percentile:
- D90
- Typical value:
- 0.107 μm
- Range:
- > 0.08 - < 0.12 μm
- Percentile:
- other: d100
- Typical value:
- 0.179 μm
- Range:
- > 0.09 - < 0.2 μm
- Fraction of constituent particles in the size range 1-100 nm:
- > 80 - < 100 %
Crystallinity
Structures
- Structure:
- crystalline
- Name:
- C.I. Pigment Red 2
- Pure structure:
- yes
Specific surface area
- Typical specific surface area:
- 41.072 m²/g
- Range of specific surface area:
- > 35 - < 45 m²/g
- Typical volume specific surface area:
- 44.52 m²/cm³
Surface functionalisation / treatment
- Surface treatment applied:
- no
- State Form:
- solid: nanoform
Constituent 1
- Reference substance name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- EC Number:
- 227-930-1
- EC Name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- CAS Number:
- 6041-94-7
- Molecular formula:
- C23H15Cl2N3O2
- IUPAC Name:
- 4-[(2,5-dichlorophenyl)diazenyl]-3-hydroxy-N-phenyl-2-naphthamide
Characterisation of nanoforms
- Type of information reported:
- single nanoform
- Name of nanoform:
- Pigment Red 2
Shape
Shape descriptionopen allclose all
- Shape category:
- elongated
- Shape:
- other: column
- Pure shape:
- no
- Typical composition:
- 11.5 %
- Range:
- > 10 - < 15 %
- Shape category:
- spheroidal
- Shape:
- spherical
- Pure shape:
- no
- Typical composition:
- 88.5 %
- Range:
- > 85 - < 90 %
Particle size distribution and range
Particle size distribution and rangeopen allclose all
- Shape category:
- elongated
Percentileopen allclose all
- Percentile:
- D10
- Typical value:
- 25 nm
- Range:
- > 20 - < 30 nm
- Percentile:
- D50
- Typical value:
- 38 nm
- Range:
- > 33 - < 42 nm
- Percentile:
- D90
- Typical value:
- 68 nm
- Range:
- > 65 - < 72 nm
- Typical length:
- 146.32 nm
- Range of length:
- > 89 - < 271 nm
- Typical aspect ratio (:1):
- 3.87 :1
- Range of aspect ratio (:1):
- >= 3.02 - <= 4.72
- Fraction of constituent particles in the size range 1-100 nm:
- > 99 - <= 100 %
Crystallinity
Structures
- Structure:
- partially-crystalline
- Pure structure:
- yes
- Range:
- > 84 - < 90 %
- Crystal system:
- not applicable
Specific surface area
- Typical specific surface area:
- > 40 m²/g
- Range of specific surface area:
- >= 30.8 - <= 57.5 m²/g
- Typical volume specific surface area:
- > 60 m²/cm³
- Range of volume specific surface area:
- >= 44.3 - <= 82.3 m²/cm³
- Skeletal density:
- >= 1.432 - <= 1.455 g/cm³
Surface functionalisation / treatment
- Surface treatment applied:
- no
Impurity
Nanoform
| Impurity |
| Nanoform |
- State Form:
- solid: nanoform
- Degree of purity:
- >= 97 - <= 100 % (w/w)
Constituent 1
- Reference substance name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- EC Number:
- 227-930-1
- EC Name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- CAS Number:
- 6041-94-7
- Molecular formula:
- C23H15Cl2N3O2
- IUPAC Name:
- 4-[(2,5-dichlorophenyl)diazenyl]-3-hydroxy-N-phenyl-2-naphthamide
Impurity 1
- Reference substance name:
- 3-hydroxy-2-naphthanilide
- EC Number:
- 202-188-1
- EC Name:
- 3-hydroxy-2-naphthanilide
- CAS Number:
- 92-77-3
- Molecular formula:
- C17H13NO2
- IUPAC Name:
- 3-hydroxy-N-phenyl-2-naphthamide
Characterisation of nanoforms
- Type of information reported:
- single nanoform
- Name of nanoform:
- C.I. Pigment Red 2 - joint submission
Shape
Shape descriptionopen allclose all
- Shape category:
- spheroidal
- Shape:
- spherical
- Pure shape:
- no
- Range:
- >= 0 - <= 100 %
- Shape category:
- spheroidal
- Shape:
- cubic
- Pure shape:
- no
- Range:
- >= 0 - <= 100 %
- Shape category:
- elongated
- Shape:
- rod
- Pure shape:
- no
- Range:
- >= 0 - <= 100 %
Particle size distribution and range
Particle size distribution and rangeopen allclose all
- Shape category:
- elongated
Percentileopen allclose all
- Percentile:
- D10
- Range:
- ca. 0.004 - ca. 0.1 μm
- Percentile:
- D50
- Range:
- ca. 0.03 - ca. 0.1 μm
- Percentile:
- D90
- Range:
- ca. 0.05 - ca. 0.2 μm
- Range of length:
- ca. 0.1 - ca. 0.405 μm
- Range of aspect ratio (:1):
- >= 3 - <= 4.4
- Additional information:
- The particle size distribution relates to all shape categories
- Fraction of constituent particles in the size range 1-100 nm:
- > 50 - ca. 100 %
- Shape category:
- spheroidal
Percentileopen allclose all
- Percentile:
- D10
- Range:
- ca. 0.004 - ca. 0.1 μm
- Percentile:
- D50
- Range:
- ca. 0.03 - ca. 0.1 μm
- Percentile:
- D90
- Range:
- ca. 0.05 - ca. 0.2 μm
- Additional information:
- The particle size distribution relates to all shape categories
- Fraction of constituent particles in the size range 1-100 nm:
- > 50 - ca. 100 %
Crystallinity
Structures
- Structure:
- crystalline
- Name:
- C.I. Pigment Red 2
- Pure structure:
- yes
Specific surface area
- Typical specific surface area:
- ca. 44 m²/g
- Range of specific surface area:
- >= 5 - <= 200 m²/g
- Skeletal density:
- ca. 1.5 g/cm³
Surface functionalisation / treatment
- Surface treatment applied:
- no
- State Form:
- solid: particulate/powder
Constituent 1
- Reference substance name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- EC Number:
- 227-930-1
- EC Name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- CAS Number:
- 6041-94-7
- Molecular formula:
- C23H15Cl2N3O2
- IUPAC Name:
- 4-[(2,5-dichlorophenyl)diazenyl]-3-hydroxy-N-phenyl-2-naphthamide
- State Form:
- solid: particulate/powder
Constituent 1
- Reference substance name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- EC Number:
- 227-930-1
- EC Name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- CAS Number:
- 6041-94-7
- Molecular formula:
- C23H15Cl2N3O2
- IUPAC Name:
- 4-[(2,5-dichlorophenyl)diazenyl]-3-hydroxy-N-phenyl-2-naphthamide
- State Form:
- solid: particulate/powder
Constituent 1
- Reference substance name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- EC Number:
- 227-930-1
- EC Name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- CAS Number:
- 6041-94-7
- Molecular formula:
- C23H15Cl2N3O2
- IUPAC Name:
- 4-[(2,5-dichlorophenyl)diazenyl]-3-hydroxy-N-phenyl-2-naphthamide
- State Form:
- solid: particulate/powder
Constituent 1
- Reference substance name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- EC Number:
- 227-930-1
- EC Name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- CAS Number:
- 6041-94-7
- Molecular formula:
- C23H15Cl2N3O2
- IUPAC Name:
- 4-[(2,5-dichlorophenyl)diazenyl]-3-hydroxy-N-phenyl-2-naphthamide
Constituent 1
- Reference substance name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- EC Number:
- 227-930-1
- EC Name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- CAS Number:
- 6041-94-7
- Molecular formula:
- C23H15Cl2N3O2
- IUPAC Name:
- 4-[(2,5-dichlorophenyl)diazenyl]-3-hydroxy-N-phenyl-2-naphthamide
- State Form:
- solid: particulate/powder
Constituent 1
- Reference substance name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- EC Number:
- 227-930-1
- EC Name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- CAS Number:
- 6041-94-7
- Molecular formula:
- C23H15Cl2N3O2
- IUPAC Name:
- 4-[(2,5-dichlorophenyl)diazenyl]-3-hydroxy-N-phenyl-2-naphthamide
Constituent 1
- Reference substance name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- EC Number:
- 227-930-1
- EC Name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- CAS Number:
- 6041-94-7
- Molecular formula:
- C23H15Cl2N3O2
- IUPAC Name:
- 4-[(2,5-dichlorophenyl)diazenyl]-3-hydroxy-N-phenyl-2-naphthamide
- State Form:
- solid: particulate/powder
- Degree of purity:
- ca. 95 % (w/w)
Constituent 1
- Reference substance name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- EC Number:
- 227-930-1
- EC Name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- CAS Number:
- 6041-94-7
- Molecular formula:
- C23H15Cl2N3O2
- IUPAC Name:
- 4-[(2,5-dichlorophenyl)diazenyl]-3-hydroxy-N-phenyl-2-naphthamide
Impurity 1
- Reference substance name:
- 3-hydroxy-2-naphthanilide
- EC Number:
- 202-188-1
- EC Name:
- 3-hydroxy-2-naphthanilide
- CAS Number:
- 92-77-3
- Molecular formula:
- C17H13NO2
- IUPAC Name:
- 3-hydroxy-N-phenyl-2-naphthamide
- State Form:
- solid: particulate/powder
Constituent 1
- Reference substance name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- EC Number:
- 227-930-1
- EC Name:
- 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- CAS Number:
- 6041-94-7
- Molecular formula:
- C23H15Cl2N3O2
- IUPAC Name:
- 4-[(2,5-dichlorophenyl)diazenyl]-3-hydroxy-N-phenyl-2-naphthamide
Composition(s) generated upon use
Other types of composition(s)
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
